Question

(n+1)×(2n+1)=?????? answer this question

Answer 1

(n+1)×(2n+1)=2n^2+n+2n+1
$= 2{n}^{2} + 3n + 1 \\ = 2 {n}^{2} + 2n + n + 1 \\ = 2n(n + 1) + 1(n + 1) \\ = (2n + 1)(n + 1)$
I hope it helps.